Occurrence and Quality of Ground Water in Southwestern King County, Washington

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Geohydrology and Ground-water Quality of East King County, Washington

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Hydrology and Quality of Ground Water in Northern Thurston County, Washington

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Geology and Ground-water Resources of Southwestern King County, Washington

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Water-resources Investigations Report

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The Ground-water System and Ground-water Quality in Western Snohomish County, Washington

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U.S. Geological Survey Water-supply Paper

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Publications of the Geological Survey

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Nitrate Occurrence in U.S. Waters (and Related Questions)

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U.S. Geological Survey Professional Paper

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